// 引入 echarts 核心模块，核心模块提供了 echarts 使用必须要的接口。
import * as echarts from 'echarts/core';

// 中国地图
import 'echarts/map/js/china';
// 引入柱状图图表，图表后缀都为 Chart
import { BarChart, LineChart, PieChart } from 'echarts/charts';
// 引入提示框，标题，直角坐标系，数据集，内置数据转换器组件，组件后缀都为 Component
import {
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  TransformComponent,
  LegendComponent,
  VisualMapComponent,
  GeoComponent

} from 'echarts/components';
// 标签自动布局、全局过渡动画等特性

import { MapChart } from 'echarts/charts'

import { LabelLayout, UniversalTransition } from 'echarts/features';
// 引入 Canvas 渲染器，注意引入 CanvasRenderer 或者 SVGRenderer 是必须的一步
import { CanvasRenderer } from 'echarts/renderers';

// 注册必须的组件
echarts.use([
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  TransformComponent,
  LegendComponent,
  BarChart,
  LineChart,
  PieChart,
  LabelLayout,
  UniversalTransition,
  CanvasRenderer,
  VisualMapComponent,
  GeoComponent,
  MapChart
])

function initEcharts(selector) {
  return echarts.init(document.querySelector(selector))
}
const LinearGradient = echarts.graphic.LinearGradient
export { initEcharts, echarts, LinearGradient }

